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Chapter 34: The Changing Face of the Earth
Chapter 34: The Changing Face of the Earth

... itself abrade the land but it also carries embedded rocks of all sizes, and thus acts very much like sandpaper. Valley glaciers gouge and scoop out the valleys they occupy, modifying them into U-shaped troughs. The topography between adjacent glaciated valleys is often angular and sharp. Continental ...
Unit One Power Point (saved as ppt)
Unit One Power Point (saved as ppt)

... Earth as a lady of 46… Most of what we recognize on Earth, including all substantial animal life, is the product of the past six years of the lady's life…. Her continents were quite bare of life until she was getting on for 42 and flowering plants did not appear until she was 45- just one year ago. ...
ch07 - earthjay science
ch07 - earthjay science

... continental crust and float each in a tube of molasses, which would float higher? a. Neither, they would float at the same level b. Ocean crust c. Continental crust d. Neither, both would sink e. None of the above ...
Dr, Bythrow - University of Hawaii at Manoa, Physics Department
Dr, Bythrow - University of Hawaii at Manoa, Physics Department

... ancient cratons, the oldest pieces of continents will measure the amount and distribution of heat-producing elements in the ancient core of continents. Here, the antineutrino signal will be dominated by the crustal component at about the 80% level. This experiment will provide data on the bulk compo ...
Geology Lab: "Edible Tectonics"
Geology Lab: "Edible Tectonics"

... BACKGROUND INFORMATION (Must be read before performing lab!)  Plate Tectonics is Geology’s most important theory – it explains so much about our planet!  Most volcanoes and earthquakes occur along the boundaries of tectonic plates. This theory also explains how certain surface features such as mou ...
Plate boundaries - MrD-Home
Plate boundaries - MrD-Home

Introduction - Assets - Cambridge University Press
Introduction - Assets - Cambridge University Press

Unit F791 - Global tectonics - Visually impaired
Unit F791 - Global tectonics - Visually impaired

File
File

... COMPARE & CONTRAST THE EARTH’S LITHOSPHERE with AESTHENOSPHERE ...
Earth Space EOC Study Guide
Earth Space EOC Study Guide

F. Y. B. Sc. Geology
F. Y. B. Sc. Geology

... Megascopic study of the following rocks a. Igneous: Granite, gabbro, rhyolite, basalt (its varieties), pegmatite (Classification based on colour index, mineral composition and texture) b. Secondary: Laterite, bauxite, breccia, conglomerate, sandstones, shales, mudstone and limestones. ...
Go to the following link to start the activity http://www.learner.org
Go to the following link to start the activity http://www.learner.org

... In 1915, Wegener published his book, The Origin of Continents and Oceans, suggesting that the earth's continents were  once _________________________________________________ in one large mass. He called the original landmass (or  supercontinent) "Pangaea," the Greek word for "_______________________ ...
Terrestrial Worlds in Comparison
Terrestrial Worlds in Comparison

... Earth’s Atmosphere was warm enough for abundant liquid water, and large enough to keep it. The H2O condensed into massive, deep oceans and setup a water cycle of evaporation and precipitation. CO2 chemistry in liquid water results in most of the CO2 locked up in the oceans & carbonaceous rocks. Plan ...
Plate Tectonics Notes
Plate Tectonics Notes

... ________________________ WITHIN THE EARTH Scientists generally agree that _________ occurring in the mantle is the basic driving force for plate movement. ________________ is the motion of matter resulting from changes in temperature Mantle Convection ______________ are masses of hotter-than-normal ...
Precambrian Earth and Life History—The Hadean and
Precambrian Earth and Life History—The Hadean and

... The Hadean is an informal designation for the time preceding the Archean Eon • Represents the formative period of Earth history • The onset of the Archean Eon coincides with the age of Earth’s oldest known rocks approximately 4 billion years old lasted until 2.5 billion years ago (the beginning of t ...
Volcanoes - National Geographic Society
Volcanoes - National Geographic Society

... volcanoes also release gases, ash, and rock. It’s a super hot mix that can be both incredibly destructive and creative. Volcanoes form at the edges of Earth’s tectonic plates. These huge slabs of Earth’s crust travel atop the partly molten mantle, the layer beneath the crust. If you could see the pl ...
hall of meteorites - American Museum of Natural History
hall of meteorites - American Museum of Natural History

... differentiated into cores and mantles. Meteorites that were formed by this process are called achondrites. Their chemistry is evidence that differentiation occurred widely and on a large scale to form the planets of the inner solar system. Crystal patterns within achondrites reveal the rate at which ...
Earth`s plates
Earth`s plates

... Plate Boundaries  Transform Boundary Plate move past each other A type of stress called shearing occurs This causes faults or cracks in the crust Earthquakes can occur here ...
Candy Bar Tectonics
Candy Bar Tectonics

... What do we call the cracks in the Earth’s surface? ________________ What do we call the large pieces of Earth’s crust? ________________ 2. Compare the candy bar to the Earth's structure. Label the parts of the candy bar to correspond to the layers of the Earth. ...
Biogeochemical cycles
Biogeochemical cycles

...  Include the “big six” elements that form the fundamental building blocks of life: carbon oxygen hydrogen phosphorus nitrogen sulfur ...
Chapter 7 Review - Plate Tectonics
Chapter 7 Review - Plate Tectonics

... This review is simply a tool to help you to begin to think about and review some of the material we covered and you must know for your test. In addition to completing this review, you should look over your notes, worksheets, the book, and any other material given. EVERYTHING we discussed and learned ...
Click here for notes to put into foldable.
Click here for notes to put into foldable.

... © Copyright 2006. M. J. Krech. All rights reserved. ...
Mineral and Mechanical Characterization of Earthen Building
Mineral and Mechanical Characterization of Earthen Building

... exsolutions. Big fragments of very finegrained quartz-rich sedimentary rocks can also be frequently observed in the studied materials which are very difficult to distinguish from the surrounding groundmass. The fine-grained groundmass generally shows an intergranular texture scarcely oriented, and c ...
Plate Tectonics
Plate Tectonics

... Plate is moving away from the Eurasian and the African Plate – The divergent boundary is called the MidAtlantic Ridge ...
Layers of the Earth Project
Layers of the Earth Project

... the 4 main layers of the Earth. This can be a cardboard chart, index cards, Ribbon attached to the model, or some other creative idea for describing each layer. A plain paper key will not be acceptable. Descriptions of the 4 MAIN Layers should include: 1. Distance across (thickness) 2. State of Matt ...
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Age of the Earth



The age of the Earth is 4.54 ± 0.05 billion years (4.54 × 109 years ± 1%). This age is based on evidence from radiometric age dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.Following the development of radiometric age dating in the early 20th century, measurements of lead in uranium-rich minerals showed that some were in excess of a billion years old.The oldest such minerals analyzed to date—small crystals of zircon from the Jack Hills of Western Australia—are at least 4.404 billion years old. Comparing the mass and luminosity of the Sun to those of other stars, it appears that the Solar System cannot be much older than those rocks. Calcium-aluminium-rich inclusions – the oldest known solid constituents within meteorites that are formed within the Solar System – are 4.567 billion years old, giving an age for the solar system and an upper limit for the age of Earth.It is hypothesised that the accretion of Earth began soon after the formation of the calcium-aluminium-rich inclusions and the meteorites. Because the exact amount of time this accretion process took is not yet known, and the predictions from different accretion models range from a few millions up to about 100 million years, the exact age of Earth is difficult to determine. It is also difficult to determine the exact age of the oldest rocks on Earth, exposed at the surface, as they are aggregates of minerals of possibly different ages.
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